C.A.P. REG-2 Dual CO2 Tank Regulator 

Use the C.A.P. REG-2 Dual Carbon Dioxide Tank Regulator to maintain optimum CO2 levels in your grow room or greenhouse for increased garden yields. 

This dual-tank CO2 regulator assembly combines a precision regulator / flow gauge and and industrial grade solenoid valve for dependable accuracy. The easy-to-adjust flow gauge can be set from 0.5 to 15 SCFH (cubic feet per hour).

Because the C.A.P. REG-2 runs two CO2 tanks at once, it doubles the normal time between refills!

The CAP REG-2 Dual CO2 Tank Regulator come complete with:

Tank pressure gauge
Pre-set Regulator
Solenoid Valve
6 foot power cable
10 foot ¼" air line
Adjustable flow meter

The Dual CO2 Tank Regulator is designed to work with any 120-volt control device. REG-2 requires a CO2 controller or a timer.

When used in conjunction with an oscillating fan (NOT included) the REG-2 gives you even CO2 dispersion throughout your growing area.

(Compressed gas tanks not included - available at welding supply shops.)

More info from the Manufacturer (PDF format - Lots of detail.)